CN102489807A - Copper-copper brazing process for transformers for rail vehicles - Google Patents
Copper-copper brazing process for transformers for rail vehicles Download PDFInfo
- Publication number
- CN102489807A CN102489807A CN2011103819904A CN201110381990A CN102489807A CN 102489807 A CN102489807 A CN 102489807A CN 2011103819904 A CN2011103819904 A CN 2011103819904A CN 201110381990 A CN201110381990 A CN 201110381990A CN 102489807 A CN102489807 A CN 102489807A
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- copper
- brazing
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- silver
- welding
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a copper-copper brazing process for transformers for rail vehicles, which is implemented through the following steps of: drawing copper parts close to each other firstly; filling a brazing flux into a splicing gap between the copper parts; simultaneously carrying out heating on the parts and the brazing flux, so that a brazing material is melted; and after the liquid brazing flux is condensed, determining that the brazing of the copper parts is completed, wherein the welding mode is a resistance brazing mode, and the brazing flux is a silver-copper brazing rod. The resistance brazing is adopted, and the brazing flux is a silver-copper brazing rod. Because silver and copper are not corroded by an insulated paint, the brazing process can guarantee the performances of transformers for rail vehicles better.
Description
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Technical field
The copper brazing that
the present invention relates to a kind of used for rail vehicle transformer connects technology.
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Background technology
in the process for making of insulated paint, raw material contain acid, so acid number is an important parameter of insulated paint, and insulated paint was corrosive to copper when acid number surpassed certain numerical value, was easy to generate phenomenons such as verdigris, copper oxidation.Especially at copper copper weld, because welding causes lead impaired, and to bring other impurity into during welding, behind the transformer dipping lacquer, weld is insulated the lacquer corrosion, and fracture influences properties of product easily; And traditional transformer copper brazing connects technology and generally adopts gas brazing; Welding rod uses the phosphor-copper welding rod, and postwelding cools off with running water, because the phosphor-copper welding rod contains the composition of phosphorus; Phosphor-copper is easy to be corroded in insulated paint; In addition, running water also contains a large amount of impurity, sneaks in the transformer during cooling weld.Therefore, under the situation that the acid number of insulated paint can't guarantee, traditional copper brazing connects technology just can not guarantee performance of products.
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Summary of the invention
The copper brazing that
the object of the invention provides the not contaminated used for rail vehicle transformer of a kind of welding assembly connects technology.
in order to achieve the above object, the technical scheme that the present invention adopted is: a kind of copper brazing of used for rail vehicle transformer connects technology, and it closes up copper parts earlier; On the splicing slit of copper parts and parts, fill up scolder; Parts and scolder are heated simultaneously again and make the welding material fusing, after the liquid solder condensation, copper parts just weld completion; Welding manner adopts resistance brazing, and described scolder is the silver-bearing copper welding rod.
After
liquid solder solidified, copper parts placed distilled water to cool off.
described welding current is 2000～3000A, and be 3～4s conduction time.
Owing to adopt technique scheme, the present invention has the following advantages
: adopt resistance brazing, welding rod uses the silver-bearing copper welding rod.Because silver-bearing copper is not corroded by insulated paint, so this welding procedure can guarantee the performance of used for rail vehicle transformer well.
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The specific embodiment
describe in the face of the preferred specific embodiment of the present invention down: the copper brazing of this used for rail vehicle transformer connects technology and comprises: earlier copper parts are closed up; Fill up the silver-copper brazing alloy bar on the splicing slit with copper parts and parts again; Again to the heating of switching on simultaneously of parts and silver-bearing copper welding rod; Electrical current is 2000～3000A, and be 3～4s conduction time, makes the fusing of silver-bearing copper welding rod; Be inhaled into and be full of between the solid-state copper workpiece gap the mutual diffusion dissolution of liquid solder and workpiece metal by the capillarity scolder; Treat to place distilled water to cool off copper parts after liquid solder solidifies, the welding of cooling back is just accomplished.
The present invention compared with prior art has following advantage:
It is the silver-bearing copper welding rod that
1, the present invention adopt soldering and scolder, prevents that effectively insulated paint on the copper parts to the corrosion of silver-bearing copper, preventing the generation of verdigris, cupric oxide.
2, the copper parts after with distilled water scolder being solidified cool off, and distilled water does not contain impurity, has guaranteed welding quality, has guaranteed the quality of transformer yet.
the foregoing description only is explanation technical conceive of the present invention and characteristics; Its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this; Can not limit protection scope of the present invention with this, all equivalences that spirit is done according to the present invention change or modification all should be encompassed within protection scope of the present invention.
Claims (3)
1. the copper brazing of a used for rail vehicle transformer connects technology; It earlier closes up copper parts, on the splicing slit of copper parts and parts, fills up scolder, parts and scolder is heated simultaneously welding material is melted again; After the liquid solder condensation; Copper parts just weld completion, it is characterized in that: welding manner adopts resistance brazing, and described scolder is the silver-bearing copper welding rod.
2. the copper brazing of used for rail vehicle transformer according to claim 1 connects technology, it is characterized in that: after liquid solder solidified, copper parts placed distilled water to cool off.
3. the copper brazing of used for rail vehicle transformer according to claim 1 connects technology, it is characterized in that: described welding current is 2000～3000A, and be 3～4s conduction time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103819904A CN102489807A (en) | 2011-11-28 | 2011-11-28 | Copper-copper brazing process for transformers for rail vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103819904A CN102489807A (en) | 2011-11-28 | 2011-11-28 | Copper-copper brazing process for transformers for rail vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102489807A true CN102489807A (en) | 2012-06-13 |
Family
ID=46181691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103819904A Pending CN102489807A (en) | 2011-11-28 | 2011-11-28 | Copper-copper brazing process for transformers for rail vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102489807A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5994571A (en) * | 1982-11-19 | 1984-05-31 | Fujitsu Ltd | Terminal for soldering |
| CN1423848A (en) * | 2000-03-21 | 2003-06-11 | 奥托库姆普联合股份公司 | Method for making an electro conductive joint |
| CN101299556A (en) * | 2008-06-13 | 2008-11-05 | 陈孙艺 | Method for welding rotor commutator |
| CN101369482A (en) * | 2008-06-24 | 2009-02-18 | 周志林 | Water-cooled transformer and its welding method for line pipe and connection copper bar |
| WO2010089647A1 (en) * | 2009-02-05 | 2010-08-12 | Toyota Jidosha Kabushiki Kaisha | Junction body, semiconductor module, and manufacturing method for junction body |
-
2011
- 2011-11-28 CN CN2011103819904A patent/CN102489807A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5994571A (en) * | 1982-11-19 | 1984-05-31 | Fujitsu Ltd | Terminal for soldering |
| CN1423848A (en) * | 2000-03-21 | 2003-06-11 | 奥托库姆普联合股份公司 | Method for making an electro conductive joint |
| CN101299556A (en) * | 2008-06-13 | 2008-11-05 | 陈孙艺 | Method for welding rotor commutator |
| CN101369482A (en) * | 2008-06-24 | 2009-02-18 | 周志林 | Water-cooled transformer and its welding method for line pipe and connection copper bar |
| WO2010089647A1 (en) * | 2009-02-05 | 2010-08-12 | Toyota Jidosha Kabushiki Kaisha | Junction body, semiconductor module, and manufacturing method for junction body |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120613 |